The QoS 642-642 exam will test materials covered under the Implementing Cisco Quality of Service QoS v2.1 course. The exam will certify that the successful candidate has knowledge and skills necessary to configure and troubleshoot Cisco IOS routers running Quality of Service protocols in Service Provider and Enterprise environments.

Cisco’s exam 642-642, “Quality of Service” (QoS) is a core requirement for the Cisco Certified Voice Professional (CCVP) certification. It is a mid level exam for IT professionals who have the “knowledge and skills necessary to configure and troubleshoot Cisco IOS routers running Quality of Service protocols in a Service Provider environment.”

Cisco does not publish the pass score for this exam, which can include these types of questions: “multiple-choice single answer, multiple-choice multiple answer, drag-and-drop, fill-in-the-blank, and simulations.” The exam has between 45 and 55 questions and lasts 90 minutes.
The topics covered by this exam include:

IP QoS Fundamentals

IP QoS Components

Modular QoS CLI and Auto-QoS

Classification and Marking

Congestion Management Methods

Congestion Avoidance Methods

Traffic Policing and Shaping

Link Efficiency Mechanisms

QoS Best Practices

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